Year Number
1950 80.14
1951 81.947
1952 84.916
1953 87.213
1954 88.44
1955 89.007
1956 91.646
1957 92.697
1958 93.279
1959 94.248
1960 95.802
1961 96.729
1962 98.596
1963 100.686
1964 102.037
1965 102.261
1966 102.326
1967 101.488
1968 100.116
1969 98.61
1970 97.153
1971 98.723
1972 100.418
1973 102.263
1974 104.354
1975 106.887
1976 105.877
1977 105.062
1978 104.499
1979 104.049
1980 103.602
1981 102.273
1982 101.188
1983 100.04
1984 98.531
1985 96.593
1986 95.923
1987 94.697
1988 93.222
1989 91.983
1990 91.152
1991 90.947
1992 90.997
1993 90.875
1994 90.199
1995 88.92
1996 87.329
1997 85.629
1998 83.591
1999 81.217
2000 78.693
2001 78.349
2002 77.68
2003 76.824
2004 75.869
2005 74.835
2006 73.587
2007 72.341
2008 71.108
2009 69.907
2010 68.763
2011 67.193
2012 65.74
2013 64.426
2014 63.296
2015 62.404
2016 61.64
2017 61.083
2018 60.715
2019 60.469
2020 60.323
2021 60.293
2022 60.314
2023 60.379
2024 60.483
2025 60.599
2026 60.631
2027 60.639
2028 60.585
2029 60.425
2030 60.125
2031 59.73
2032 59.216
2033 58.54
2034 57.692
2035 56.656
2036 55.514
2037 54.253
2038 52.906
2039 51.517
2040 50.144
2041 48.887
2042 47.665
2043 46.532
2044 45.564
2045 44.812
2046 44.419
2047 44.228
2048 44.203
2049 44.277
2050 44.422
2051 44.764
2052 45.168
2053 45.65
2054 46.227
2055 46.912
2056 47.734
2057 48.63
2058 49.577
2059 50.558
2060 51.55
2061 52.521
2062 53.479
2063 54.391
2064 55.226
2065 55.958
2066 56.526
2067 56.983
2068 57.32
2069 57.541
2070 57.651
2071 57.627
2072 57.501
2073 57.298
2074 57.054
2075 56.784
2076 56.545
2077 56.298
2078 56.062
2079 55.874
2080 55.768
2081 55.829
2082 55.966
2083 56.187
2084 56.484
2085 56.87
2086 57.424
2087 58.055
2088 58.754
2089 59.496
2090 60.268
2091 61.13
2092 62.025
2093 62.914
2094 63.781
2095 64.595
2096 65.375
2097 66.107
2098 66.777
2099 67.361
2100 67.851